Effect Of Extracts Of Plant On Oviposit,Behavior,Develop And Growth Against Hyphantria Cunea Drury

In order to screen plant pesticide insecticidal activities to Hyphantria cunea Druy AconitumkusnezoffiiReichb,Rheum ofticinale baill Sophora flavescens Ait,Azadirachtin Macleaya cordata(willd)R.Br.Melia azedarach L.Arisaema heterophyllum Blume Euphorbia pekinensis Rupr.Stellera chamaejasme L.and Periploca sepium Bge.as plant materials imago and larva of Hyphantria cunea Drury as testing insect.Adopting normal temperature distill the plant material that ethanol as impregnant.Firstly Oviposition Deterrent Effect and toxicity preliminarily screened by leaf steep,Three kinds of plant extracts were choosed..Secondly the three kinds of plant material 10 varieties plant extracts were tested on Hyphantria cunea Active substances were extracted with ethanol and acetidin solvent from one of them and its bioaetivity upon Hyphantria cunea Drury were determined.The Antifeeding and Growth and Development effect were tested by leaf steep.The toxic was tested by the insect steep.The main results are treatment for DPS statanalysis.The results is follows:1.Oviposition Deterrent Effect from 10 varieties plant extracts aganist Hyphantria cunea Drury were tested.All kinds varieties plant extracts had the stronger Oviposition Deterrent Effect beside Periploca sepium Bge.AconitumkusnezoffiiReichb.Rheum officinale baill Sophora flavescens Ait.Azadirachtin Macleaya cordata(willd)R.Br. Melia azedarach L.Arisaema heterophyllum Blume Euphorbia pekinensis Rupr.Stellera chamaejasme L.the Oviposition Deterrent pecent is 98.65%.97.77%.96.32%.87.65%. 81.99%.76.18%.74.16%.57.13%.45.36%.2.Aconitumkusnezoffii.Melia azedarach L.and Azadirachtin has the higher toxicity effect against the larvae of Hyphantria cunea Drury.After two days,3 varieties of plant extracts shows the higher terminal,three kinds of distilling the terminal percent is 93.02%.96.51%and 93.02%.3.Aconitumkusnezoffii Reichb.extracted with acetidin has the higher toxicity effect also.The Antifeeding and Inhibition of growth of Aconitumkusnezoffii Reichb with ethanol was higher than extracted with acetidin against larvea of Hyphantria cunea Drury Treatment for 24h.48h and 72h the ethanol and acetidin median antifeeding concentrations is 0.55mg/mL.0.40mg/mL.0.32mg/mL and0.68mg/mL0.59mg/mL.0.49mg/mL;In antifeeding,Aconitumkusnezoffii Reichb. extracted with ethanol 5.00 mg/mL concentrations the larvae growth inhibition ratio isl 100%,but the acetidin is 83.55%.Treatment for 24h.48h.72h the two extracting the median toxicity concentrations is 1.436mg/mL.1.059mg/ mL.0.623mg/ mL.and 12.56mg/mL.2.06mg/mL.1.08mg/mL,so extracted with acetidin toxicity was better than extracted ethanol.4.The ethanol and acetidin extracts from Melia azedarach to the toxicity of extracted with acetidin excect was better than ethanol Hyphantria cunea Drury has the higher toxicy.Results indicated that the extracts from Melia azedarach with ethanol and acetidin have antifeeding.inhibition of growth and toxic,the ovicidal activity was closely related to the concentration.Antifeeding and inhibition of growth of ethanol ether extracts was better than acetidin ether extracts,but toxic effect opposition.Treatment for 24h.48h and 72h the median antifeeding concentrations of ethanol and acetidin extracts is 1.10mg/ mL. 0.87mg/mL.0.62mg/mL and 1.88mg/mL.1.29mg/mL.1.04mg/mL;Treatment for 24h,5.00mg/mL concentrations of ethanol extracts the larvae growth inhibition ratio is 100%,acetidin extracts growth inhibition ratio is only 83.55%.Treatment for 24h.48h. 72h the two extracting the median toxicity concentrations is 5.82mg/mL.1.99mg/mL. 1.29mg/mLand 11.51mg/mL.4.35mg/mL.2.17mg/mL,so extracted with acetidin toxicity was better than extracted ethanol.5.Azadirachtin has the higher toxic to Hyphantria cunea Drury.Treatment for 24h. 48h.72h the the median antifeeding concentrations was 1.6×10^-3mg/mL.1.12×10^-3 mg/mL and 1.03×10^-3mg/mL.For treatment 3 days 8.0×10^-3mg/mLand 4.0×10^-3mg/mL the inhibition rates was all 100%.The toxic effect to Hyphantria cunea Drury by steep for 72h 8.00×10^-3mg/mL.4.00×10^-3mg/mL.2.00×10^-3mg/mL and 1.00×10^-3mg/mL terminal was 100%.92.22%.85.56%and78.89%.